/*
	This file is part of the OdinMS Maple Story Server
    Copyright (C) 2008 Patrick Huy <patrick.huy@frz.cc> 
                       Matthias Butz <matze@odinms.de>
                       Jan Christian Meyer <vimes@odinms.de>

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU Affero General Public License version 3
    as published by the Free Software Foundation. You may not use, modify
    or distribute this program under any other version of the
    GNU Affero General Public License.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU Affero General Public License for more details.

    You should have received a copy of the GNU Affero General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

package net.sf.odinms.provider.wz;

import net.sf.odinms.tools.data.input.GenericSeekableLittleEndianAccessor;
import net.sf.odinms.tools.data.input.RandomAccessByteStream;
import net.sf.odinms.tools.data.input.SeekableLittleEndianAccessor;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.awt.*;
import java.io.DataOutputStream;
import java.io.File;
import java.io.IOException;
import java.io.OutputStream;
import java.io.RandomAccessFile;

/*
 * Ported Code, see WZFile.java for more info
 */
public class WZIMGFile {
	private Logger log = LoggerFactory.getLogger(WZIMGFile.class);
	private WZFileEntry file;
	private WZIMGEntry root;
	private boolean provideImages;
	@SuppressWarnings("unused")
	private boolean modernImg;

	public WZIMGFile(File wzfile, WZFileEntry file, boolean provideImages, boolean modernImg) throws IOException {
		RandomAccessFile raf = new RandomAccessFile(wzfile, "r");
		SeekableLittleEndianAccessor slea = new GenericSeekableLittleEndianAccessor(new RandomAccessByteStream(raf));
		slea.seek(file.getOffset());
		this.file = file;
		this.provideImages = provideImages;
		root = new WZIMGEntry(file.getParent());
		root.setName(file.getName());
		root.setType(MapleDataType.EXTENDED);
		// dumpImg(new FileOutputStream(file.getName()), slea);
		this.modernImg = modernImg;
		parseExtended(root, slea, 0);
		root.finish();
		raf.close();
	}

	protected void dumpImg(OutputStream out, SeekableLittleEndianAccessor slea) throws IOException {
		DataOutputStream os = new DataOutputStream(out);
		long oldPos = slea.getPosition();
		slea.seek(file.getOffset());
		for (int x = 0; x < file.getSize(); x++) {
			os.write(slea.readByte());
		}
		slea.seek(oldPos);
	}

	public WZIMGEntry getRoot() {
		return root;
	}

	private void parse(WZIMGEntry entry, SeekableLittleEndianAccessor slea) {
		byte marker = slea.readByte();
		switch (marker) {
			case 0: {
				String name = WZTool.readDecodedString(slea);
				entry.setName(name);
				break;
			} case 1: {
				String name = WZTool.readDecodedStringAtOffsetAndReset(slea, file.getOffset() + slea.readInt());
				entry.setName(name);
				break;
			} default:
				log.error("未知: {} 在注销 {}", marker, (slea.getPosition() - file.getOffset()));
		}

		marker = slea.readByte();

		switch (marker) {
			case 0:
				entry.setType(MapleDataType.IMG_0x00);
				break;
			case 2:
			case 11: //??? no idea, since 0.49
				entry.setType(MapleDataType.SHORT);
				entry.setData(Short.valueOf(slea.readShort()));
				break;
			case 3:
				entry.setType(MapleDataType.INT);
				entry.setData(Integer.valueOf(WZTool.readValue(slea)));
				break;
			case 4:
				entry.setType(MapleDataType.FLOAT);
				entry.setData(Float.valueOf(WZTool.readFloatValue(slea)));
				break;
			case 5:
				entry.setType(MapleDataType.DOUBLE);
				entry.setData(Double.valueOf(slea.readDouble()));
				break;
			case 8:
				entry.setType(MapleDataType.STRING);
				byte iMarker = slea.readByte();
				if (iMarker == 0) {
					// String pathToData = MapleDataTool.getFullDataPath(entry);
					entry.setData(WZTool.readDecodedString(slea));
				} else if (iMarker == 1) {
					entry.setData(WZTool.readDecodedStringAtOffsetAndReset(slea, slea.readInt() + file.getOffset()));
				} else {
					log.error("Unknown String type {}", iMarker);
				}
				break;
			case 9:
				entry.setType(MapleDataType.EXTENDED);
				long endOfExtendedBlock = slea.readInt();
				endOfExtendedBlock += slea.getPosition();
				parseExtended(entry, slea, endOfExtendedBlock);
				break;
			default:
				log.error("未知 {}", marker);
		}
	}

	private void parseExtended(WZIMGEntry entry, SeekableLittleEndianAccessor slea, long endOfExtendedBlock) {
		byte marker = slea.readByte();

		String type;
		switch (marker) {
			case 0x73:
				type = WZTool.readDecodedString(slea);
				break;
			case 0x1B:
				type = WZTool.readDecodedStringAtOffsetAndReset(slea, file.getOffset() + slea.readInt());
				break;
			default:
				throw new RuntimeException("未知: " + marker + " 在注销 " +
					(slea.getPosition() - file.getOffset()));
		}
		
		/*
		 * "Shape2D#Vector2D"
		 * "Shape2D#Convex2D"
		 * "Property"
		 * "Sound_DX8"
		 * "Canvas"
		 * "UOL"
		 */
		if (type.equals("Property")) {
			entry.setType(MapleDataType.PROPERTY);
			slea.readByte();
			slea.readByte();
			int children = WZTool.readValue(slea);
			for (int i = 0; i < children; i++) {
				WZIMGEntry cEntry = new WZIMGEntry(entry);
				parse(cEntry, slea);
				cEntry.finish();
				entry.addChild(cEntry);
			}
		} else if (type.equals("Canvas")) {
			entry.setType(MapleDataType.CANVAS);
			slea.readByte();
			marker = slea.readByte();
			if (marker == 0) {
				// do nothing
			} else if (marker == 1) {
				slea.readByte();
				slea.readByte();
				int children = WZTool.readValue(slea);
				for (int i = 0; i < children; i++) {
					WZIMGEntry child = new WZIMGEntry(entry);
					parse(child, slea);
					child.finish();
					entry.addChild(child);
				}
			} else {
				log.warn("标志 != 1 ({})", marker);
			}
			int width = WZTool.readValue(slea);
			int height = WZTool.readValue(slea);
			int format = WZTool.readValue(slea);
			int format2 = slea.readByte();
			slea.readInt();
			int dataLength = slea.readInt() - 1;
			slea.readByte();
			
			if (provideImages) {
				byte[] pngdata = slea.read(dataLength);
				entry.setData(new PNGMapleCanvas(width, height, dataLength, format + format2, pngdata));
			} else {
				entry.setData(new PNGMapleCanvas(width, height, dataLength, format + format2, null));
				slea.skip(dataLength);
			}
		} else if (type.equals("Shape2D#Vector2D")) {
			entry.setType(MapleDataType.VECTOR);
			int x = WZTool.readValue(slea);
			int y = WZTool.readValue(slea);
			entry.setData(new Point(x, y));
		} else if (type.equals("Shape2D#Convex2D")) {
			int children = WZTool.readValue(slea);
			for (int i = 0; i < children; i++) {
				WZIMGEntry cEntry = new WZIMGEntry(entry);
				parseExtended(cEntry, slea, 0);
				cEntry.finish();
				entry.addChild(cEntry);
			}
		} else if (type.equals("Sound_DX8")) {
			entry.setType(MapleDataType.SOUND);
			slea.readByte();
			int dataLength = WZTool.readValue(slea);
			WZTool.readValue(slea); // no clue what this is

			int offset = (int) slea.getPosition();
			entry.setData(new ImgMapleSound(dataLength, offset - file.getOffset()));
			slea.seek(endOfExtendedBlock);
		} else if (type.equals("UOL")) {
			entry.setType(MapleDataType.UOL);
			slea.readByte();
			byte uolmarker = slea.readByte();
			switch (uolmarker) {
				case 0:
					entry.setData(WZTool.readDecodedString(slea));
					break;
				case 1:
					entry.setData(WZTool.readDecodedStringAtOffsetAndReset(slea, file.getOffset() + slea.readInt()));
					break;
				default:
					log.error("未知: {} {}", uolmarker, entry.getName());
			}
		} else {
			throw new RuntimeException("未知: " + type);
		}
	}
}
